Meninges and dural partitions

Question 1

What are the 3 meningeal layers?

Answer 1

Dura (hard) - fibrous
Arachnoid - outer periosteal and inner meningeal (Avascular)
Pia- closely invests brain surfaes- oxygenated blood

Question 2

Relevant spaces

Answer 2

Extradural space- between dura and skull
Subdural- dura and arachnoid
Subarachnoid- between arachnoid and pia (CSF)

Question 3

Dural partitions

Answer 3

Restrict rotatory displacement of brain (compress NV structures)
Falx cerebri
Tentorium cerebelli
Falx cerebelli
Diaphragma sellae